[monasca-tempest-plugin] Tag train-last

Train branch is in Extended Maintenance now[1]. Tempest and
tempest plugins are branchless which means master version of
Tempest and its plugins is used to test the supported stable
branches.

Once any stable branch is moved to EM state then, Tempest and
its plugins compatible tag[2] needs to be released so that we can
keep testing the EM stable branches with that tag once master
Tempest and its plugins are not compatible[3].

Tagging 'train-last'[4] as well as a new version also with same hash.

[1] https://releases.openstack.org/train/index.html
[2] https://docs.openstack.org/tempest/latest/stable_branch_support_policy.html
[3] https://docs.openstack.org/tempest/latest/tempest_and_plugins_compatible_version_policy.html
[4] https://docs.openstack.org/project-team-guide/stable-branches.html#extended-maintenance

Change-Id: Ic92f0048ed6f3c23f7f060797508be70cef141b7

deliverables/train/monasca-tempest-plugin.yaml

@@ -12,3 +12,7 @@ releases:
     projects:
       - repo: openstack/monasca-tempest-plugin
         hash: e8db39351c75898f5c88619c3bad5e8b9f744947
+  - version: train-last
+    projects:
+      - repo: openstack/monasca-tempest-plugin
+        hash: 062cb7576a574d5fd12f75bea351e6381b19a5a1

deliverables/xena/monasca-tempest-plugin.yaml

@@ -8,3 +8,8 @@ repository-settings:
   openstack/monasca-tempest-plugin: {}
 team: monasca
 type: tempest-plugin
+releases:
+  - version: 2.3.0
+    projects:
+      - repo: openstack/monasca-tempest-plugin
+        hash: 062cb7576a574d5fd12f75bea351e6381b19a5a1